Crank-case ventilation



April 22, 1930. 4W H, MOYSE 1,756,001

CRANK CASE VENTILATION Filed June 6, 1927 Patented Apr. 22, 1930 yUNITED STATES PATENT OFFICE WILLIAM H. MOYSE, F OSHAWA, ONTARIO, CANADA,ASSIG-NOR T0 GENERAL MOTORS Y RESEARCH CORPORATION, OF DETROIT,MICHIGAN, A CORPORATION OF DELAWARE CRANKfCASE VENTILATION Applicationfiled .Tune 6, 1927. Serial No. 196,839.l

This invention relates to a crank case ventilator for an automobileengine.

It is the object oi the invention to provide an improved ventilator forthe engine crank case, which will use suction obtained from 'part of theblast Jfrom the tan. More specically it is the objectof the invention toprovide a Ventilating device which will conduct the oil fog from thecrank case through the cover for the valve rocker arms. This is a simplemethod of Ventilating the crank case and has the advantage of utilizingthe oil fog from the crank case for oiling the rocker arms.

Other objects and advantages of the invention will appear in the courseof the following description, taken in connection with the acfcompanying drawing, and will be particularly pointed out in the appendedclaims.

In the drawing:

The figure is a side elevation of a conventional engine with partsbroken away.

The numeral 10 indicates a conventional internal combustion motor andthe numeral 12 the valve rocker arm cover. This cover is broken away atthe left of the figure, disclosing the rocker arm mechanism. As thespecific structure of the rocker arm mechanism is immaterial to thiscase, a detailed description thereof is unnecessary.

An oil filler inlet is indicated at 14 and connected to the side lotthis inlet is a flexible tube 16 leading to the opening 18 in the sideof the rocker arm cover. It desired, an ordinary bai-lie plate may beplaced over the forvward side of the opening 18 to produce an aspiratingelect. The cover is provided with an air inlet opening 20 at its frontend. A similar opening 22 is provided at the rear end of the rocker armcover and fixed in this open-4 ing is the flexible tube 24. This tube 24extends down below the dustpan so that the fumes will not enter the car.

The operation of my device is as follows. Part of the air blast from thefan enters the opening 20 and passes along the cover through the opening22 into the outlet tube 24, as indicated by the arrows. This creates asuction in the flexible tube 16 and a current of air is drawn from thecrank case through the tube 16 into the cover l2. As-the oil within thecrank case is kept well churned while the engineis running, the airconducted through the tube 16 to the cover 12 is laden with lineparticles of oil which keep the rocker armV mechanism well lubricated.In addition some fumes from the crank case enter the rocker arm coverthrough the usual tappet rod openings.

What I claim is:

1. In an internal combustion motor having a crank case and overheadmechanism, a cover for said mechanism, an outlet leading from the rearend vof said cover, an opening in the front end of said cover, and aconduit from said crank case to said cover.y

2. In an internal combustion motor having a crank vcase "and overheadmechanism, a cover for said mechanism, an outlet leading from the rearend of said cover, an opening in the front end of said cover, and aconduit leading from said crank case to a point on said cover adjacentthe front end.

3. In an internal combustion motor having a crank case and overheadmechanism, al

cover for saidmechanism, an outlet leading from the rear end of saidcover, an opening in the front end of said cover, a removable oilfilling inlet inv said crank case, and a flexible conduit between saidoil filling inlet and said cover.

4. In a structure as recited in claim 3, said conduit being connected tosaid cover adjacent the front end.

5. An internal combustion engine having a crankcase, an overhead valvemechanism, a cover for said mechanism forming a valve compartment, apassage establishing communication between the crankcase and thecompartment for supplying oily vapors to the valve mechanism, said coverbeing provided with spaced air intake and discharge openings, and meansfor passing a stream of air into said compartment through said intakeopening and out through. said discharge opening, said stream exerting anaspirating etiect on the passage to withdraw vapors from the crankcase.

6. An internal combustion engine having a cooling fan, a crankcase, anda valve compartment, a passage establishing communication between thecrankcase and the compartment for supplying oily vapors to the valvemechanism, said compartment being prol vided with an opening adjacentits forward end arranged toY receive a yportion ofthe fan blast, andwithan opening adjacent its rear end for the discharge of the airstream, said passage being arrangedso that it is subject to aspiratingaction-=of the air stream passing through the compartment to Withdrawvapors from the crankcase. l

' 7 An internal combustion engine for automobiles having a crank. case,an overhead A valve mechanism, and a cover for said mechanism forming avalve compartment, aY passage connecting the crankcase and the valvecompartment for conducting oily vapors thereto, Vand a suction tube,"mounted on said my; cover-and leading from saidcompartment toapointbeneaththecar Where it is subject f `to the aspirating action ofthepassing air currents to apply suction to said compartment to removevapors therefrom. n 25; v 8. An internal combustion engineforautomobiles having a crank case, an overhead valve mechanism, and acover for saidmechanism forming a valve compartment,` a passageconnecting the crankcase and the valve 30, compartment for conductingoily vapors thereto, anda suction tube mounted on said cover and leadingfrom said compartment to a point beneath the car Where it is subjectftothe aspirating action ofthe passing air currents to apply suction tosaid compartment to` remove vapors therefrom, said engine being providedwith the usual cooling fan and said cover being provided ,With anopening adja event. its forward end to receive a portion of the fanblastsaid blast assisting the aspirating action on the suction tube. v s

.In testimony whereof IaHiX my signature. WILLIAM Hi MOYSE.

